the wrong full of death law you suit says by oh mission or outright lying the league hid the dangers of repetitive blows to the head. >>> let's go back and talk about the 49ers and the new stadium in claire. we learned it will be the first profootball stadium in the country certified as a sustainable energy facility. a deal was announced to install a number of solar collectars atop the stadium. it will generate enough electricity in a year to offset the power consumed by all of the 49ers home games making it the first sports facility in california to become a zero net energy facility. the 49ers held their first practice since becoming nfc champions today and wayne freedman was there. tonight while they know the super bowl is on the line and it is a big deal so far the team seems to be treating it just like any other game. >> reporter: if professional football is a modern watered down version of interurban warfare there could be one of the fortre is sses. >> how long have you been sitting here? >> two hours. >> how much longer are you going to is sit here? >> another two hours until w